摘要
Several metal (such as aluminum, iron etc.) film systems deposited on liquid (silicone oil) substrates have been successfully fabricated by a thermal evaporation method, and the special me- chanical properties and complex ordered surface structures have been systematically studied. The experimental results show that there exists a com- pressive stress gradient in these films, making cracks nucleate at the film edges and then extend to the central regions gradually. Because the interaction between solid films and liquid substrates in the tan- gent direction is very small, the metal films can mo- tion freely on the oil surfaces as a whole. In order to release the compressive stress, the broken film pieces collide, crush and superpose each other, which finally results in the formation of ordered band- shaped structures with an anti-symmetric character- istic. Based on the special mechanical properties of these nearly free sustained films, the morphologies and growth behaviors of the ordered structures are analyzed and discussed in detail.
Several metal （such as aluminum, iron etc.） film systems deposited on liquid （silicone oil） substrates have been successfully fabricated by a thermal evaporation method, and the special mechanical properties and complex ordered surface structures have been systematically studied. The experimental results show that there exists a compressive stress gradient in these films, making cracks nucleate at the film edges and then extend to the central regions gradually. Because the interaction between solid films and liquid substrates in the tangent direction is very small, the metal films can motion freely on the oil surfaces as a whole. In order to release the compressive stress, the broken film pieces collide, crush and superpose each other, which finally results in the formation of ordered band- shaped structures with an anti-symmetric characteristic. Based on the special mechanical properties of these nearly free sustained films, the morphologies and growth behaviors of the ordered structures are analyzed and discussed in detail.
基金
This work was supported by the National Natural Science Foundation of China （Grant No. 211571067）
the Foundation of Zhejiang Pruvincital Education Department in China （Grant No.20040373）.
关键词
有序结构
机械性能
金属薄膜
液体基底
内压
liquid substrate
metal film
ordered structure
mechanical property
internal stress.
